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Overview
| Comment: | The noReadlock property on a pager object implies the readOnly property. Use this fact to simplify the logic in sqlite3PagerSharedLock(). (CVS 6944) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
886e665f6cf780464b280c286b03c9fb |
| User & Date: | drh 2009-07-25 22:13:35 |
Context
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2009-07-27
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| 10:05 | When extracting values from a record to use in an UPDATEd version of that record, apply OP_RealAffinity if required. Fix for #3992. (CVS 6945) (check-in: 3616766a user: danielk1977 tags: trunk) | |
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2009-07-25
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| 22:13 | The noReadlock property on a pager object implies the readOnly property. Use this fact to simplify the logic in sqlite3PagerSharedLock(). (CVS 6944) (check-in: 886e665f user: drh tags: trunk) | |
| 19:31 | Remove obsolete assert and testcase macros related to ticket #2565 (CVS 6943) (check-in: f0024b31 user: drh tags: trunk) | |
Changes
Changes to src/pager.c.
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** The pager is used to access a database disk file. It implements ** atomic commit and rollback through the use of a journal file that ** is separate from the database file. The pager also implements file ** locking to prevent two processes from writing the same database ** file simultaneously, or one process from reading the database while ** another is writing. ** ** @(#) $Id: pager.c,v 1.626 2009/07/25 19:31:32 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" /* ** Macros for troubleshooting. Normally turned off */ ................................................................................ } if( pPager->state==PAGER_UNLOCK || isErrorReset ){ sqlite3_vfs * const pVfs = pPager->pVfs; int isHotJournal = 0; assert( !MEMDB ); assert( sqlite3PcacheRefCount(pPager->pPCache)==0 ); if( !pPager->noReadlock ){ rc = pager_wait_on_lock(pPager, SHARED_LOCK); if( rc!=SQLITE_OK ){ assert( pPager->state==PAGER_UNLOCK ); return pager_error(pPager, rc); } }else if( pPager->state==PAGER_UNLOCK ){ pPager->state = PAGER_SHARED; } assert( pPager->state>=SHARED_LOCK ); /* If a journal file exists, and there is no RESERVED lock on the ** database file, then it either needs to be played back or deleted. */ if( !isErrorReset ){ |
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** The pager is used to access a database disk file. It implements ** atomic commit and rollback through the use of a journal file that ** is separate from the database file. The pager also implements file ** locking to prevent two processes from writing the same database ** file simultaneously, or one process from reading the database while ** another is writing. ** ** @(#) $Id: pager.c,v 1.627 2009/07/25 22:13:35 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" /* ** Macros for troubleshooting. Normally turned off */ ................................................................................ } if( pPager->state==PAGER_UNLOCK || isErrorReset ){ sqlite3_vfs * const pVfs = pPager->pVfs; int isHotJournal = 0; assert( !MEMDB ); assert( sqlite3PcacheRefCount(pPager->pPCache)==0 ); if( pPager->noReadlock ){ assert( pPager->readOnly ); pPager->state = PAGER_SHARED; }else{ rc = pager_wait_on_lock(pPager, SHARED_LOCK); if( rc!=SQLITE_OK ){ assert( pPager->state==PAGER_UNLOCK ); return pager_error(pPager, rc); } } assert( pPager->state>=SHARED_LOCK ); /* If a journal file exists, and there is no RESERVED lock on the ** database file, then it either needs to be played back or deleted. */ if( !isErrorReset ){ |